Improve usage of permissions

I've:

• - Changed all string literal for permissions
• - Replaced them by their own constants
• - Add a reference in the file for a better developer experience
• - Add a new constant for the permission administer components

wim leers → made their first commit to this issue’s fork.

Looking great! 🤩 This is exactly what I'd hoped for since the start of the XB codebase 🤓🙏